18986952619 has 4 divisors (see below), whose sum is σ = 19093025160. Its totient is φ = 18880880080.

The previous prime is 18986952599. The next prime is 18986952637. The reversal of 18986952619 is 91625968981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91625968981 = 174763 ⋅524287.

It is a cyclic number.

It is not a de Polignac number, because 18986952619 - 2⁹ = 18986952107 is a prime.

It is a super-2 number, since 2×18986952619² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18986952689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53036002 + ... + 53036359.

It is an arithmetic number, because the mean of its divisors is an integer number (4773256290).

Almost surely, 2^18986952619 is an apocalyptic number.

18986952619 is a deficient number, since it is larger than the sum of its proper divisors (106072541).

18986952619 is a wasteful number, since it uses less digits than its factorization.

18986952619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106072540.

The product of its digits is 16796160, while the sum is 64.

The spelling of 18986952619 in words is "eighteen billion, nine hundred eighty-six million, nine hundred fifty-two thousand, six hundred nineteen".